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rhombencephalon : ウィキペディア英語版
Hindbrain

The hindbrain or rhombencephalon is a developmental categorization of portions of the central nervous system in vertebrates. It includes the medulla, pons, and cerebellum. Together they support vital bodily processes.〔(【引用サイトリンク】 title=Brain atlas - Hindbrain )
The hindbrain can be subdivided in a variable number of transversal swellings called rhombomeres. In the human embryo eight rhombomeres can be distinguished, from caudal to rostral: Rh8-Rh1. Rostrally, the isthmus demarcates the boundary with the midbrain.
A rare disease of the rhombencephalon—"rhombencephalosynapsis"—is characterized by a missing vermis resulting in a fused cerebellum. Patients generally present with cerebellar ataxia.
The caudal rhombencephalon has been generally considered as the initiation site for neural tube closure.〔(SpringerLink - Journal Article )〕
==Myelencephalon==
Rhombomeres Rh8-Rh4 form the myelencephalon.
The myelencephalon forms the medulla oblongata in the adult brain; it contains:
* a portion of the fourth ventricle,
* the glossopharyngeal nerve (CN IX),
* vagus nerve (CN X),
* accessory nerve (CN XI),
* hypoglossal nerve (CN XII),
* and a portion of the vestibulocochlear nerve (CN VIII).

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Hindbrain」の詳細全文を読む



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